Power take-off



April-27, 1943. QEFRUDDEN POWER TAKE -OFF Filed Mayle, 1939 PatentedApr. 27, 1943 'arrasar ro s oyp Conrad E. Frudden, Wautosa, assigner to'Allis-ers Mannfactg @o :e

waukee, Wis., a corporation ot Deia `implication, May i9', i939,

lli

E No. @34,5%

11 Cia; (mida-11) The invention relates to motor vehicles and it isconcerned more specifically with an improved mechanism for transmittingpower from the vehicle motor to the propelling wheels and to al powertake-oit` for driving external machinery, the mechanism being preferablysuch that the pro- 'peiling wheels and the power take-ofi may be drivenfrom the motor either separately or siinultaneously, as desired.

For instance, tractors are commonly used for various operations whichrequire that take-od power be available while the tractor is standing Ystill, and for other operations which require that take-off power beavailable while the tractor is moving. A belt pulley ordinarilyfurnishes taireof power, when the tractor is standing still, for drivingexternal machinery such as a pump, a saw or ensilage cutter, and a powertake-ofi shaft, commonly termed an implement drive shaft, ordinarilyfurnishes take-od power, when the tractor is moving, for drivingexternal machinery, such. as a combine or mower which may be hitched tothe tractor.

l't is an olvject` of the invention to provide an improved power take-oiattachment for a tractor, which meets the mentioned requirements fortake-od power, that is the requirement for takeoi power when the tractoris standing "still, and the requirement for take-oli power when thetractor is moving.

More specifically it is an object of the invention.

to provide an attachment of the mentioned chary -acter which isconstructed as a compact unit, and which may be readily attached to andremoved from the tractor. 4The invention contemplates to provide such s,unit which may be furnished as additional equipment, so that the tractormay originally be sold without it, for instance, in cases where thepurchaser desires to use the tractor for operations which require notake-oft` power, such asplowing or cultivating. Should the purchaserlater desire to use the tractor for belt work or other operationsrequiring take-ofi power he may purchase the powertake-oi attachmentseparately and install it on the tractor without difilculty,. theattachment being so constructed that its installation on the tractorrequires no special tools or shop facilities.

Another object of the invention is toprovide an attachment of thementioned character which, when detached 'from the tractor, forms acompact unit which may be shipped conveniently in substantiallyassembled condition without taking up excessive'shipping space.

With these objects in view, the invention conytemplates a power take-odattachment which comprises a cap housing adapted to be mounted over anopening in the housing structure of the tractor, and which has aninternal bearing aiording an aary support for a drive shaft permanentlymounted on the tractor, the construction ming such that the bearing maybe removed from the drive shaft when the cap housing is removed from thetractor.

Another object of the invention is to provide power take-od attachmentof the mentioned construction, in which the internal auxiliary bearingis adequately lubricated not only while power is being transmitted to'the belt pulley -shaft or to the implement drive shaft, but also duringperiods when the tractor is used for plowing or other operations whichrequire no take-oit` power, and during which periods the mentioneddriveshat is subject to continuous rotation.

Another object of the invention is to provide a power take-od attachmentfor tractors, comprisy ing a housing and two power take-'od shaftsjournaled therein, one being an implement drive shaft arranged to extendlongitudinally of the tractor and the other being a pulley shaftextending transversely oi the implement drive shaft.

More specifically, it is an object oi the invention to provide s. doublepower take-oir attachment of the mentioned character in which thehousing, the. power take-0H shafts and gearing within the housing fortransmitting power from i one of said shafts to the other are combinedto iorm a. simple and compact unit which may be readily attached to anddetached from the tractor.'

Another object oi' the invention is to provide an improved power take-odattachment for tractors, affording a lubricant storage space in additionto and in communication with a lubricant storage space of the tractor,and to distribute part of the lubricant contained Within the additionalstorage space to elements of the attachment which are located above thelevel to which the storage spaces are normally iilled with lubricant.

It is a further object of the invention to provide an improved doublepower take-od attachvment having an implement drive shaft and a pulleyshaft and mechanism for transmitting power from a driving shaft on thetractor revolving at engine speed, to the implement drive shaft, whichmechanism causes the implement drive shaft to rotate at less than enginespeed, and which mechanism preferably causes thepulley shaft.v to rotateat a higher speed than the implement drive shaft.

These and other objects and advantages of the invention will be apparentfrom the following depower take-off mechanism shown propelling wheelsoi! the housing I. tudinally through the housing I, and a forwarddefinition, the shaft 9 tively connectible with scription of a preferredembodiment of the invention. Referring to the drawing accompanying andforming part of this specification, and in which like referencecharacters designate the same or similar parts in the various views:

Fig. 1 is a sectional top view of a drive and power take-off mechanismfor a tractor, the section being taken on line I-I of Fig. 2;V

Fig. 2 is a sectional side in Fig. 1, the section being taken on linelI-II of Fig. 1;

Fig. 3 is a sectional rear view of the mechanism shown in Figs. 1 and 2,the section being taken on line III-III of Fig. l; I

Fig. 4 is a detail view on line IV-IV of Fig. 1;

Fig. -5 is a detail view on line V-V of Fig. 1;

Figs. 6 and 7 are detail views of a shift finger forming part of themechanism shown in Figs. 1 and 2. Fig. 6 corresponding to a view'on lineVI-VI of Fig. 1; and

Fig. 8 is a sectional view of a cover for use in connection-with part ofthe mechanism shown in Figs. 1 and 2, the section shown in Fig. 8 beingtaken on the same plane as the section shown in Fig. 2.

The embodiment of the invention illustrated in the accompanying drawingsindicates its incorporation in a tractor of the type having a pair ofaxially spaced propelling wheels, differential and final drive gearingfor driving the propelling wheels. a change speed transmission. a motor,and the usual mechanism including a master clutch for transmitting powerfrom the motor to the drive shaft of the transmission, the driven shaftof the transmission being drivingly connected with the differentialgearing. For a full disclosure of a tractor of 'the mentioned characterreference is made to a copending application of C. E.- Frudden and W. F.Strehlow, Serial No. 274,164, led May 1'7, 1939, Tractor, features ofthe invention herein disclosed and claimed beingV also disclosed in saidcopending application. that the invention is not limited to the specifictype of tractor disclosed in said copending. application. since theinvention possesses features which may also be used advantageously inother types of tractors, for instance. ina crawler type tractor in whichthe drive mechanism for the includes a pair of steering clutches insteadof a differential gear. f

Referring to Figs. 1 drawing, a change speed transmission mechanism anda. differential gearing are shown enclosed in a housing I having sidewalls 2 and 2, a top wall I, a bottom wall l and a front wall i; acontinuous flange 1 extending inwardly a short length from'the side, topand bottom lwalls of the housing I at the rear end thereof, and theinner edge of the flange 1 giellirsig s; lsax;

rectan ar large ope a muy sul A drive shaft 9 extends longiportlon ofthe shaft 9 beyond the front wall I. is splined for connection with anengine driven shaft' (not shown) which maybe a propeller t at shaft roating wm be referred to hereinbelow as apower driven shaft of thetractor. When the tractor engine is running, this power driven shaft isnormally rotating, and the mentioned dierential gearing forms part of arotatf'able' propelling mechanism of the tractor which is enclosed inthe housing I and which is selecview of the drive and l i astma? beingprovided for that purpose with a rearward extension or associated shaftelement which is rotatable about an axis extending through the opening lof the housing I. As shown in Figs.

1 and 2, the rearward portion of the'power driven shaft 9 projects asubstantial distance rearwardly from the housing I through the rearopening 8 into a cap housing I0 which is secured to the housing I overthe rear opening 8 by means of bolts Il screwed into the ange 1 of thehousing I, the cap housing I0 extending outwardly from the housing I andhaving an open side conforming to the opening 8 of the housing I.

The power driven shaft 9 is axially integral and rotatably mountedintermediate its ends within'the housing I in angularly fixed relationthereto by'means of corneal roller bearings I2 and Il, the rollerbearing I2 being mounted in an opening of the front wall 6 and retainedby a bearing retainer Il, and the roller bearing I3 being mounted In anopening of a transverse wall I5 of the housing I. An oil seal I6 withinthe bearing retainer Il prevents the escape of lubricant from thehousing I through the roller bearing I2. A driven` shaft I1 is mountedin the front wall 6 and in the transverse wall I5 directly below thedrive shaft 9 by means of roller bearings I8 land I9, a cap 2li beingsecured to the front wall 8 in front of the roller bearing I8 to preventthe escape of lubricant from the housing I through the roller bearingI8. The driven shaft I 1 forms the variable speed shaft of the changespeed transmission enclosed within the forward portion of the housing I,and the shaft 9 forms the drive shaft of said transmission. The changespeed mechanism is of the shiftable gear type and includes shiftinggears 2| and 22 It should be understood, however. y

and 2 of the accompanying engine speed. For purposes of anddisconnectible from on the driven shaft I1, and non-shiftable gears 22,2l and 25 on the drive shaft 9. 'I'he hubs of the gears 2I and 22 haveinternal splines engaging splines of the driven shaft I1 to secure thegears non-rotatably but shiftably to the driven shaft I1. and thenon-shiftable gears 23, 2l and 2l likewise have internally splined hubsengaging splines of the drive shaft 9 to secure the gears non-rotatablyto the drive shaft 9. A spacer 2i between thegears 24 and 25 on thedrive shaft I prevents axial displacement of the gears on the driveshaft, the end gears-23 and 29 being seated against the inner races ofthe roher bearings I2l and I3, respectively. The driven shaft I1 has aforward portion of reduced diameter rearwardly of the roller bearing I8on which a gear 21 is freely rotatable. the gear being prevented fromaxial displacement on the driven shaft I1 by contact with a spacer 28seated against the inner race of theroller bearing. I8 and by contactwith a shoulder at the forward ends ofthe splines of the driven shaftI 1. The gear 22 is in constant mesh with circumferential teeth of thegear 21, the width of the teeth on the gear 21, however, being abouttwice the width of the'teeth on gear,23.1 The external diameter of gear21 is somewhat reduced atthe side thereof facing the gear 2I, and thegear 2I has internal teeth 2l which may be clutchingly engaged lwith thereduced portion of the gear 21 by axial forward shifting movement of thegear 2|. An integrally formed double gear having gear sections by meansof rollers 34, as shown in Fig. 1, the

-shaft 33 being supported at its rearward end in the transverse wall Iof the housing l, and at its forward end in a wall portion 35 extendinginwardly from the side wall 2 of the housing I'. The gear section 3l ofthe double gear is in constant mesh with the gear 25 on the power drivenshaft 9', .and the gear section 32 is adapted to be meshingly engagedwith the shiftable gear 22 by axial movement of the gear 22 forwardly inthe direction towards gear 2l fromthe posi' tion in which gear 22 isshown in Fig. 2.

For first speed forward the shiftable gear 22 I isV moved into mesh withthe low speed gear 23 of the gears-2l and 22 comprises a shifting fork3S in engagement with a collar 3l of the shiftable gear 22 land ashifting fork 38 in engagement with a collar 3S of the shiftable gear2l.

3i the roller bearing I2 is mounted and, as'may be seen from Fig. 1,some of the lubricant in pocket 46 may ow through the bore 48 and passthrough-a cut-out of retainer I4 into a space rearwardly of the seal I6and in front ofthe roller bearing I2. This roller bearing will be,

therefore, continuously supplied with an adequate amount of lubricantwhile the shaft B is rotating. t

Another part of the lubricant scooped into the pocket 46 may ow througha bore 50 in the shaft 33 into a pocket 5I formed on the rear face ofthe transverse wall I5 as shown in Figs. 1 and 5.

' The pocket 5I is formed by a wall portion 52 The sluiting forks 36 and36 are slidably" mounted on shafts 4D and 4i, respectively, which aresupported ona frame comprising a plate 32 and arms @3 and t4 secured tothe plate Q2. The supporting frame for the shafts-til and il is mountedin a side opening of the housing I, the plate Q2 forming a cover forsaid side opening. A gear shift lever 45 is universally mounted v in thetop wall il of the housing i as shown in Fig. 2 and selectivelyengageable with the forks 36 and 38 in the usual manner.

The wall portion in which the forward en ef the shaft as for the doublegear ai, e2 is mounted forms part of a pocket t6 within the housing I,the pocket 36, having a wall Mextending forwardly from the wall portion35 and merging with theside wall 2 and the front wall 6 of the housing ias shown in'Figs. l and 4. The wall It? of the pocket 46 extendsupwardly to a horizontal plane through the axis of the shaft t and issuitably recessed in the vicinity of the gear 23 as shown in Fig. l.

In operation, the interior of the housing I is filled with lubricant toa normal level indicated by the dash dotted line A in Fig. 2, the rearopening 8 of the housing l, which extends above and below said normallubricant level being closed by the cap housing Ill,`as shown in Fig. 2,or as an alternative, by a cover 96 as shown in Fig. 8, in order topermit storage of lubricant in the housing I at said normal level. Thegear 23 is in constant mesh with the gear 21, and the lower part of thegear 2l will continuously sweep through the body of lubricant in thehousing l While the shaft S is being rotated. A certain amount oflubricant adhering to the teeth of the gear 2 will be raised by the gear27 andpicked up by the gear 23, which latter gear rotates in thedirection of the arrow B indicated in Fig. 4. The centrifugal forceacting upon the lubricant 'on gear 23 will throw said lubricant againstthe side wall 2 and the top wall 4 of the housing I above the pocket 46,and from said walls thelubricant will run down into the pocket 46. Thepocket y 46 will therefore'be supplied with a continuous stream oflubricant while the shaft 9 is rotating. A bore 48 in the front wall 6of the housing I con nects the pocket 46 with the opening inwhichmerging with the 'transverse wall I5, and the pocket 5icommunicates with the opening in the transverse wall I5 in which theroller bearing i3 of the drive shaft Sis mounted. A baille wash-V vbaiiie Washer is spaced peripherallyfrom the shaft 9,V and while therewill be a continuous flow of lubricant through the annular space betweenthe baiiewasher 5I and the shaft 9,' a certain amount of lubricant willalso pass between the inner and outer races of the roller bearing I3 andkeep this roller bearing properly lubricated. Suitably located holes inthe transverse wall I5 permit equalization of the lubricant level Aforwardly and rearwardly of said wall.

It should be noted that the outer races of the rollerl bearings I2 andit are conical and therefore incapable of retaining a limited amount oflubricant like the concave face of the outer race of a ball bearing, andthat` the lubrication requirements of these roller bearings: aretherefore much more stringent than those of a ball bearing. Thelubricating system described hereinbefore provides for an adequatesupply of lutention.

1n orderto supply the rollers 36 carrying the double gear 3l and 32 authlubricant, the bore 5J has a radial branch E3 through which part' of thelubricant 'passing through the bore 5D may escape in order to keep therollers 34 lubricated.

A bevel pinion 54 is integrally formed with the driven shaft Il at therear end of the latter meshes and the propelling mechanism of thetractor which, as stated, is enclosed in the rearward portion of thehousing I includes a bevel ring gear 55 which meshes with the pinion 54.Secured to the ring gear 55 is the' mentioned differentialgearing whichis of conventional construction and includes the usual pinion cage 5Swhich has oppositely extending arms journaled in the side walls 2 and 3of the housing I, the cage supporting 'a nest of bevel gears 51 throughwhich power is transmitted to the diie'rentlal shafts'58 and 59. Inoperation, the shaft il rotates in the direction of arrow Bin Fig. 4, as

, stated, and when the transmission is set for any ring gear 55Awi11rotate in the direction of arrow C in Fig. 2, the ring gear 55 beingindicated in dash dotted lines in this figure because it is offsettowards the near side of the shafts 9 and I1 in Fig. 2. The differentialshafts 58 and 69 carry nal drive pinions on their outer ends (not shown)which mesh with final vdrive gears secured to the propelling wheels ofthe tractor, as usual; and rotation of the ring gear 55 in the directionof arrow C in Fig. 2 will therefore cause forward movement of thetractor.

The bevel ring gear 55 of the differential forms a driving gear of thelpropelling mechanism of the tractor, and it isfmount'ed, within thehollow support afforded by the housing I, for rotation about a,transverse horizontal axis. The driven shaft I1 which is drivinglyconnected with the ring gear 55 constitutes a countershaft which extendsforwardly from the ring gear 55 within the hollow support or housing Ion a longitudinal horizontal axis. The conical roller bearings` I2 andI3 serve as a pair of axially spaced transmission beatings which aremounted within the housing I laterally of the countershaft i1 in advanceof the driving gear 55 and remote from the rearward aperture 8 of thehousing I. As stated hereinbefore, the bearings I2 and I3 retain thedrive shaft 9 .in angularly xed relation to the housing I, and they arecapable of adequately, supporting the drive shaft 9 when power is beingtransmitted therethrough to the propelling wheels of the tractor andwhen the tractor is equipped with a rear cover 96 as shown in Fig. inwhich case the relatively long rearwardly overhanging portion of thedrive shaft 9 is not engaged by any additional bearing or support. Y

The cap housing I which is secured over the opening 8 to the rear end ofthe housing I, has an internal transverse wall 6|) in its upper portion,and an auxiliary roller bearing 6I is mounted in a bore of saidtransverse Wall 50. As shown in Figs. 1 and 2', the auxiliary bearing 5Iis mounted on the cap housing I0 in such a. position that when the caphousing is secured to the casing i of the tractor the bearing 6I willsupport the shaft 9 at a, rearward portion` of the latter for rotationabout the common axis of the bearings I I2 and I3, that is, for rotationabout an axis extending through the casing opening 8 above the normallubricant level A. 'Ihe shaft 9 has at its rear end a portion of reduceddiameter journaled in the bearing 6I, and a cone shaped portion 62 atsaid rear end projects rearwardly from the roller bearing 5I. Thetransverse wall 69 merges with the side walls of the cap housing I9 andforms part of a chamber within the cap housing for the accumulation oflubricant above thernormal lubricant level indicated by the dashdottedline A in Fig. 2, the bottom of said lubricant chamber being formed bya. horizontal wall portion 6l which merges with the wall portion 60 andwith the side and rear walls of the cap housing 'IIL A tube. 65, open atits front and rear ends, is press-fitted into an opening of the wall GIIlaterally of the roller bearing 5I and extends forwardly from the caphousing III into the rear portion of the housing I. As shown in Figs. 1and 2, the tube 55 extends at the side of the upper part of the ringgear 55, only a portion of the tube being indicated in dash dotted linesA in Fig. 2 because the tube is offset towards the near side of shaft 9in said figure. The interior of the housing I and cap housing In isfilled with lubricant to the level indicated by line` A in Fig. 2, asstated, and when the ring gear u rotates in the direction of arrow C,some of the lubricant Within the housing I will adhere to the ring gear55 and will be carried upwardly therewith. The forward open end of thetube 65 is positioned closely to the periphery of the ring gear 55, andlubricant adhering to the ring gear will be pushed into the tube as thering gear 55 rotates in the direction of arrow C. When the tractor isprogressing, the lubricant chamber rearwardly of the roller bearing BIwill therefore be filled with lubricant. Since the opening for theroller bearing 6I is in communication with the interior of the lubricantchamber formed by the walls 60 and 6I, the lubricant accumulating insaid chamber will have access to the rollers of the roller bearing 6I.

An implement drive shaft 66, or first power ytake-ofi shaft, is mountedin the cap housing Il 4 for rotation about an axis extending parallel tothe axis of the power driven shaft 9, the shaft 6B being radially spacedor offset from the axis of the shaft 9 and extending transversely of theplane of the opening 8 of the hollow support formed by the rear housingstructure I of the tractor. The forward end of the implement drive shaft66 is supported in 'a roller bearing 61 mounted in a transverse bridgeportion 68 of the cap housing I0, and a roller bearing 69 mounted in therear wall of the cap housing Isupports the implement drive shaft 66intermediate its ends, the rear end of the implement drive shaftprojecting outwardly from the cap housing I9 and being splined forconnection with a coupling element for driving external machinery. Anoil seal 10 around the implement drive shaft 66 prevents the escape oflubricant from the cap housing I0 through the opening in which theroller bearing 69 is mounted, and a protecting sleeve 1I surrounding theouter end of the implement drive shaft is detachably secured to the caphousing. In addition to the implement drive shaft 66 a pulley shaft 12,or second power takeoff shaft, is mounted in the cap housing III, thepulley shaft extending at right angles to the implement drive shaft andbeing journaled in roller bearings 13 and 14 mounted in a laterallyextending arm 15.of the cap housing I0. The pulley shaft 12 carries abelt pulley 19 which is detachably secured to the outer end of thepulley shaft projecting from the armV 15 by means of a nut 11, the hubof the belt pulley being seated on a conical portion of the shaft 12 andkeyed to the shaft in the usual manner. A seal 18 in the arm 15preventsthe escape of lubricant from the ca housing I 0 along thepulleyA shaft 12. v

A single piece double gear having circumferential spur teeth 19 andlateral bevel teeth 80 is keyed on the implement drive shaft 66 adjacentto the lbridge portion Il. and the pulley shaft 12 has a bevel'pinion 8|secured to its inner end in mesh with the bevel teeth 89 of the doublegear 19, 80. The side wall of the cap housing I0 opposite to the pulleyshaft 12 has an opening 82 indicated in Fig. 3, which is normally closedby a cover 92', the opening l2 being'provided for convenience inmachining the interior of the arm 15.

Slidably mounted on a splined portion of the power driven shaft 9 withinthecap housing Il is a pinion I3 which may be moved into and out of meshwith the spur teeth19 of the double gear Y' 19, 80 the pinion 93 andspur gear section 19 forming a selectively engageable and disengageshaft9 and the rst power take-olf shaft 86. The second power take-olf shaft12 is permanently geared to the first power take-o shaftI 86, as

stated, and movement of the pinion 83 into and out of mesh with the spurgear section 19 causes not only the rst power take-off shaft 88 but alsothe second power take-oil' shaft 12 to be connected with anddisconnected from the power driven shaft 9. The mechanism for shiftingthe pinion 83 comprises a shift finger 84 vshown in detail in Figs. 6and 7, which is secured to a rock shaft 85journaled in the side wall ofthe cap housing I0. The shift finger is secured to the inner end of therock shaft 85 by means of a set screw 86 and carries a roller 81 whichengages a groove of a shift collar 88 integrally formed with the pinion83. The wall of the cap housing on which th'e rock shaft 85 ismountedhas a cylindrical recess-above the rock shaft in which a spring89 is seated, the spring bearing against a ball 90 contacting the shiftlinger 84 at the side thereof remote from the roller 81. Rocking of therock shaft 85 by means of s. handle9l secured to its outer end causesshifting movement of the pinion 83 into and out of mesh-with the spurteeth 19 of thedouble gear 19, 80, the pinion being shown out of meshwith the double gear in Figs. 1 and 2. In this position of the pinionthe ball 90 engages a conical recess 92 of the shift finger 84, and dueto the action of spring 89 the shift nger is resiliently locked inposition to hold the pinion 83 out of mesh with the double gear 19, 80.Another conical recess 93 similar to the recess 92-is formed in theshift finger, ,86 and cooperates with the ball 90 when the pinion ismoved into mesh with the double gear- 19, 89, to resiliently lock thepinion in its meshed position. A spring ring 94 is mountedV in a grooveat the rear end of the splined portion of the drive shaft 9 to limitbackward movement of the pinion 88, and a stop 95 is formed on the shiftinger for engagement with the cap housing I8 ln order to limit forwardmovement of the pinion 89.

In order to drive the power take-oil:` shafts, the pinion 83 is movedinto mesh with the spur teeth of the double gear 19, 80, and since thepinion 83 is of much smaller diameter than thespur geardsection of thedouble gear 19, 88 the implement drive shaft 68 will be rotated at alower speed than that at which the shaft 9 is rotating, the lattershaft, as stated, preferably rotating at engine speed. The engine speedis 'usually too high for driving various implements desired to beoperated in connection with the tractor, and the gear reduction betweenthe pinion 83 and double gear 19, 89 aords a suitably low speed of theimplement drive shaft as is desired in connection `With variousimplements to be coupled with said shaft, for instance. a harvesterthresher. Rotation of the double gear 19. 80 by the pinion 83 causes thespur and bevel teeth of this gear to sweep through the lubricant whichis stored within the lower part of the cap housing Ill at the normallubricant level A.

The speed of the belt pulley is ordinarilyvrequired to be higher thanthe speed of the implement drive shaft and such higher speed of thebeltpulley is afforded by the gear ratio between the bevel gear section89 and the bevel pinion 8l, the latter having a considerably smallernumber rotate at a somewhat-lower speed than the drive shaft 9.

It should be noted that the point of mesh between'the pinion 83 andthedouble gear 19, 89 is approximately on the same level as the lower partof the roller bearing 8l, and since the roller'` bearing is onlyslightly spaced rearwardly 'from the spur gear section 19 of the doublegear 19, 80, some of the lubricant elevated by the double gear `19. 80,and diffused laterally at the point of mesh of the pinion 88 and doublegear 19, 80, will reach the roller bearing 6I and keep this bearingproperly lubricated while the tractor is standing' still and its enginepower is used for belt work, such as threshing or silo filling. In theselectively engageable and disengageable power transmitting connectionbetween the power driven shaft 9 and the power take-off shafts '88 and12 functions, when engaged, to supply the auxiliary bearing 6I withlubricant from the lower portion of the caphousing I9,-

but it is incapable of so functioning when disengaged. The power drivenshaft 9 is normally rotating when the tractor engine is running, 'asstated, and the described lubricant transfer from the casing I to theupper lubricant chamber in the cap housing I9 prevents the hearing 6lfrom running dry when the propelling mechanism of the tractor includingthe gear wheel 55 is connected with the shaft 9 through the change speedtransmission and whenV the power transmitting connection Ybetween theshaft 9 and the power take-0R shafts 86 and 12 is disengaged due todisengagement of the pinion 83 from the spur gear section 19.

The cap housing llil with the two power takeoff shafts mounted thereon.together with the v.-loul'ile'gear 19, 80 and the bevel pinion 8l andthe shift mechanism for the pinion 83, forms a compact unit which may bereadily attached toy and detached from the housing I while the driveshaft 9 remains in the position in which it is shown in Figs. l and 2.The rear of the shaft 9 is journaled in the bearing 6I as stated, thejournal connection permittingaxial or tele scopic separation of theshaft and bearing from each other. The inner race of the roller-bear:

ing 8i is retained on the shaft 9 by a spring ring" 89 seated in agroovev forwardly of the cone 8,2, the groove being more clearly shownin Fig. 8. The rollers of the bearing 6l are mounted in .a cage which isamally retained on the outer race of the bearing, and when the bearing6I and shaft 9 'are separated, the inner race may be withdrawn togetherwith the shaft 9, while the outer race, rollers and roller cage remainwithin the cap housing I0.

In order to remove the double power take-oil! unit from the tractor, thebolts Il which secure the cap housing I9 to the housing I Aareunscrewed. The power 'take-oil unit may then be moved rearwardly awayfrom the housing I to' telescopically disengage the outer race androllers of bearing 8l from the inner race which remains on the driveshaft 9, and thereafter the unit may be moved transversely of the driveshaft 9 to disengage the roller 91 of the shift ilnger 8l from thegroove of the shift collar 880i of teeth than the bevel gear section ofthe double 8l is preferably such that the belt lpulley will 78.;

the pinion 83, the latter remaining in place on the splinedrearwardportion of the drive shaft9.

If desired, the pinion 83 and the inner race of the roller bearing 8|may be withdrawn/v" from the drive shaft 8 after removal of the spring.rings 98 and 88, and the openingl of the housing I may be closed by thecover 98 as indicated in Fig-f8. Qn

other words,

lguished from the power I8 shown In Fis.

*rr-ment, m which me it may l" 'l coveredlbytheeover 8.a: shown in theother hand, the double power take-E unit may be readily attached to atractor which was originally furnished with the cover 88 as shown inFig. 8. Afterv removal of the cover, the pinion 83 and the inner race ofthe roller bearing 6I are slipped upon the rear portion of the driveshaft 8, and the spring rings 84 and 88 are installed. 'I'he cap housingIl with the other parts shown in Figs. l and 2 mounted thereon is thenmoved into position for connection -with the housing I by means of thebolts II. While moving the cap housing into the said position the roller81 of the shift nger 84 is first engaged with the groove 88 of thepinion 88 and the rollers and outer race of bearing 8l are then axiallymoved upon the inner race on the end of the driveshaft 8. suchmanipulation being facilitated by the conical rearward projection of thedrive shaft 8.

It will be seen that power may be transmitted to the implement driveshaft 86 and to the belt pulley shaft 12, irrespective of whether thetractor is standing still or in motion. When the engine of the tractoris running and take-off power is desired for belt work while the tractoris standing still, the change speed transmission is put in neutral, asshown in Fig. 2, and the pinion 83 is moved l into mesh with the gear13. On the other hand,

if take-off power is desired while the tractor is moving, for instance,for driving the cuttingand threshing mechanism of a combine which ishitched to the tractor, the change speed transmission may be shiftedinto any one of the mentioned. gear combinations, and power may betransmitted the belt pulley shaft in the same manner as when tractors,

to the implement drive shaft and to the tractor is standing still,namely, by shifting the gear 83 into mesh gear 18.

When the tractor is used for plowing or other I operations which requireno take-off power, the

auxiliary bearing 8l is prevented from running dry by the describedtransfer of lubricant from the housing I into the chamber in rear of theauxiliary bearing Il through the tube il. Such lubricant transfer,however', only takes place while the tractor is moving. and during beltwork, when the tractor is standing still, the auxiliary bearing 8l islubricated by diffusion of lubricant at the point of mesh of the gears18 and 83, as has also been mentioned hereinbefore.

The d rlve shaft I is rigid from end to end, and, as shown inthedrawing,ithas a ilxed axial with the power take-off length which is somewhatgreater than the combined spacings between the transmission andauxiliary bearings I2, I3 and 8i. In' other words, 'I the spacingbetween the transmission bearings the transmis- I2 andl8plusliespacingbetwee'n bearing ll is sion bearing I8 and the auxiliaryY somewhat less than the'axial length of the drive 4shaft l. In order tosunnortthe drive shaft I in the three bearings, its length shouldobviously be not less than the combined axial spaeingsbetweenthebearings.

' n snomdmtherbe'nod tutti drive'snsft sis axial displacement by theconical roller permanently rctainedlgtlnt which, as indicatedhereinbefore, may be mounted onthetractorinplaceofthesheetmetal cover edoriginally bearings I! and I8,and that it isV mountedonthetra'ctorasdistintake-off attachmentv seizes? Should the purchaserlater desire to use the tractor for belt work or other operationsrequiring take-off power, he may purchase the power take-off attachmentseparately and install it on the tractor in a simple manner as has beendescribed hereinbefore.

The -position in which the drive shaft 9 is permanently held by thebearings I2 and I3 is such that its rear end projects beyond the rearend of the housing I.- This is a desirable arrangement because itaffords a compact design of the power take-off unit which, when removedfrom the tractor, has no driving part projecting beyond the open side ofthe cap housing I0. When detached,

a ing up excessive shipping space.

It should-also be noted that there is no sleeve coupling or similarslidable connection between the portion of the drive shaft 9 whichcarries the pinion 83 and the portion of said shaft which is mounted inthe bearings I2 and I3. In other words, the disclosed constructionavoids a sleeve coupling in the drive shaft for thepower take-offmechanism, which sleeve coupling has heretofore been common in powertake-oil mechanism for and which has complicated the design and added tothe manufacturing costs of such earlier power take-offmechanisms.V f1

While in the foregoing a preferredi embodiment of th invention'has beenshown and described, it should be understood that it is not intended tolimit the invention to the details of construction herein shown anddescribed for various modications within the scope of the claims mayoccur to persons skilled in the art.

. It is claimed and desired to secure by Letters Patent:y

1. A double power take-off attachment for a tractor having a powerdriven shaft projecting through an opening in its rear housing structureand a pinion mounted on said shaft, said power .take-off attachmentcomprising a cap housing cured to said implement drive shaft withinsaidA cap housing; anda bearing for said power .driven shaft, withinsaid cap housing in proximity to the periphery of said spur gear;whereby lubricant retained within said rear housing structure l by saidcap housing and elevated by said spur gear 8. Thetractormaybepurchas.,

will become effective to lubricate said bearing.

v2. In a motor vehicle, a hollow support, a driving gearV rotatablewithin s'aidsupport about ak transverse horizontal axis, a countershaftdriv-.

ingly connected with said driving gear and extending forwardly therefromwithin said support on a longitudinal horizontal axis, a pair of axiallyspaced transmission bearingsmolmted within said 'support laterally ofsaid countershaft and in advance of said driving gear, a cap housingdetachably seuredto said support over an aperture of the latter at ofsaid driving gear and 18 an auxiliary bearinginrearof said aper-` ture,an axiallyintegral power driven shaft of a length not less than thecombined axial spacings between said transmissioniand auxiliarybearings, said power driven shaft -being permanently mounted on saidvehicle within said transmission bearings and being additionallysupported in said auxiliary bearing for rotation on the axis of saidtransmission bearings, change speed gearing operable by said powerdriven shaft to rotate said countershaft, a power take-off shaftrotatably mounted on said cap housing, and power transmitting meansincluding a gear moimted on a portion of said power driven shaftforwardly of and in proximity to said auxiliary-bearing, operable bysaid power driven shaft tov rotate said power take-on shaft, said powertransmitting means being separable and said auxiliary bearing beingdetachable from said power driven shaft, whereby said cap housing, powertake-on shaft and auxiliary bearing may be removed from said supportwithout removing said power driven shaft therefrom.

3. In a motor vehicle, a hollow support having an end aperture and apair of relatively spaced transmission bearings therein remote from saidend aperture and alined on ahorlzontal axis extending through said endaperture, a cap housing detachably secured tosaid support-over said endaperture thereof vand having a portion extending transmission bearingsand being additionally? supported on said auxiliary bearing for rotationon said horizontal propelling means includ- 40 ing gearingwithin saidsupport drivingly connected with said power driven shaft, a rst powertake-oil shaft'mounted on said cap housing for rotation about an axisradially spaced from the tion of said shaft,l a ilrst power take-oil.shaft mounted on said cap housing for rotation about an axis radiallyoifset from theaxis of said aux-` iliary bearing element, means withinsaid' cap housing engageable by a driving element'on said powerv drivenshaft for transmitting power from the latter to said first powertake-oi! shaft, 'a secl ond power take-off shaft mounted on'sa'id caphousing for rotation about an axis radially oil'set from the axis ofsaid auxiliary bearing'element, and power transmitting meanswithin saidcap housing drivingly connecting said first with said second powertake-oshaft. l5 t having an opening in the rear housing-structure 5. A powertake-oil attachment for a tractor thereof, a power driven shaft havingan integral end portion outside of said housing structure and bearingmeans within said housing structure normally supporting said shaft, ata` portion thereof remote from said opening, for rotation about an axisextending through said opening, said power take-oli attachmentcomprising a cap housing adapted to be secured to said housing structurein a position to cover said opening thereof, anauxiliary bearing elementmounted .within said cap housing for axial alinement withss'aid bearingmeans of said housing structure' 'and movable, by movement of said c'aphousing, into and out of rotary supportingengagement with acomplementary bearing lement on said integral end portion of said shaft,a rst power take-oil shaft mounted on said cap housing for rotationabout an axis radially offset from and extending parallel to the axis ofsaid auxiliary bearing element,

a gear wheel'mounted on said rst power takeofi shaft within said caphousing ina plane at the side ofy said auxiliary bearing element which,in said covering position of said cap housing, faces towards saidhousing structure of said tractor,

said gear wheel being adapted to cooperate with a pinion on saidintegral end portion of said power driven shaft, a second power take-0Eshaft axis of said power driven shaft and extending v substantiallyparallel therewith, a second power take-off shaft mounted in saidoutwardly extending portion of said cap housing for rotation about anaxis extending transversely of the axis of said rst power takeoif shaft,gearing within said cap housing drivingly connecting said first withsaid second power take-off shaft, and means for transmitting power fromsaid power driven shaft to said rst power take-o shaft, said powertransmitting means being separable and said auxiliary bearing beingdetachable from said power drivenf am gear WheeL 7. A double powertake-on unit for a tractor Y shaft, whereby said cap housing, power'take-0H shafts and bearing may be removed from said support withoutremoving said powerdriven shaft 4. A power take-off attachment for atractor having an opening in the rear housing structure thereof, a powerdriven shaft having an integral end portion outside of said housingstructure and within said housing structure normally' supporting saidshaft, at aportion thereof 65 remote from'said opening,. for rotationabout'an l axis extending through said opening, said power talee-oi!attachment comprising 'acap housingadaptedtobesecuredtosaidhousingstructure i f 0inapositiontocoversaidopeningtberemanwi Said auxiliary bearing elementmolmted within said cap housing for axial alinement with said bearingmeans of said `housing structure and movable,

I movement of said cap housing, into and out lgrotary supportingengagement with a compledriven element of said tractor,

mounted on said cap housing for rotation about an axis extendingtransversely of the axis of said iirstpower take-on shaft at the side ofsaid plane facing said aumliary bearing element, and a bevel -v gearconnection vbetween said first and second power take-oil? sl'iafts.V

. 6. A power take-off attachment as setforth in claim 5, in which saidgear wheel has a bevel gear section at the side thereof facing thelaxis' of said second power take-off shaft, and vin which said secondpower take-oil' shaft has a bevel gear adapted to mesh with said bevelgearsection of having an opening in the rear housing structure thereofand a power driven element rotatable on a horizontal axis extendingthrough said opening, said power take-off unit comprising a cap housingadapted to be secured to said housing structure .over said-openingthereof, a irst power take-oi! shaft mounted in said cap housing forrotation about an ams extending parallel to the axis of said powerdriven element, a second power takeoil shaft mounted in said c aphousing for rotation .about an axis extending outside of said rearhousing structure-of said tractor transversely of the axis of said powertake-oi! shaft, gearing cap housing drivingly connecting one of saidpower take-oi! shafts with the other, and a gear secured tosaid firstmentioned power take-ofi shaft adapted to mesh with a gearon said powerl7 i mentary bearing element on said integral end por- 8. In a motorvehicle, a` gear casing, change speed and differential gear mechanismsmounted in forward and rearward compartments, respectively, of said gearcasing, said change speedmechanism comprising a variable speed shaftdrivingly connected with said differential gear mechanism and a powerdriven shaft having a forward portion mounted in axially spaced bearingsof said forward compartment for rotation about an axis extending throughsaid rearward compartment, and a' rearward portion supportinglyconnected with said forward portion for rotation therewith about saidaxis, a first power take-off gear mounted on said rearward portion ofsaid power driven shaft, a cap member detachably secured to said gearcasing having a rotary supporting connection with said rearward portionof said power driven shaft in'rear of said first power take-off gear,said rotary supporting connection being separable axially of said powerdriven shaftand permitting removal of said cap shifting movement or thelatter, and a shirt ele,-L

ment movably mounted. on said cap member and engaging said pinion forshifting the latter by operation of said shift element, said shiftelement being disengageable from said pinion to permit removal of saidcap member together with said power take-off shaft, gear and shiftelement as a unit from said gear casing while said power driven shaftand pinion remain on said gear 10. double power take-of! attachment fora .tractor having an opening in the rear housing ysaid cap housingadapted to support a power member from said gear casing'without removalof said rst power take-od gear from said' rearward portion of said powerdriven shaft, a power take-ofi shaft journaled on said cap member, and

a driving connection between said first power takeoi' gear and saidpower take-off shaft including member and adapted to mesh with saidfirst power take-off gear, one of saidpower take-off gears beingdisengageable from the other to permit removal of said cap membertogether with said power take-off shaft and said second power taireoffgear as a unit from said gear casing while said power driven shaft andsaid first power take-off gear remain on said gear casing 9. In a motorvehicle, a gear casing comprising a transmission compartment and adifferential compartment in 'rear of said transmission compartment, apower driven shaft having a forward portion mounted in axially spacedbearings of A a second power take-oil' gear mounted on said cap I drivenshaft Velement for rotation about a first axis extending through saidopening, a first power take-o5 shaft mounted on 4said cap housing forrotation about an axis spaced from said first axis and extendingtransversely of the plane of said opening, a second power take-of! shaftmounted on said cap housing for rotation about an axis extending outsideof said rear housing structure transversely of said rst power take-offshaft,

and gearing operable by said shaft element and drivingly connected with.said first and second power take-oirshafts for transmitting rotation ofsaid shaft element at one speed ratio to said first power take-off shaftand at a diierent speed ratio to saidl second power take-off shaft.

11. A power take-ofi' attachment for a tractor having a gear casing anda cover detachably secured thereto over an opening thereof for retaininglubricant within said casing at a normal level,

' s'aid power take-off attachment comprising a cap housing adapted to besecured over said opening, in lieu of said cover, in an outwardlyprojecting position to permit storage of lubricant within said casingandwithin a lower portion of said cap housingat said normal level, afirst and a'. second power take-oi! shaft rotatably mounted on said caphousing, gearing Within Sad Cap 110118- lubricant level,

ing drivingly connecting said shafts, with each other including a gearelement adapted to sweep through said lubricant stored within said lowerportion of said cap housing, a bearing within said cap housing adaptedto support a rotary element drivingly connected with the tractor sourceof power and rotatable onan axis above said normal a pinion rotatable bysaid rotary Velement about said axis, and another gear element ingconnection being separable axially-of said power driven shaft andpermitting removal of l said cap member from said gearcasingwithoutremoval of said pinion from said rearward portion'A of said powerdriven shaft, apower take-of! shaft journaled on said cap member, a gearmounted on said power take-off shaft adapted to be meshed with'anddemeshed from said pinion by said axial 0 5 secured to one of saidshafts adapted to sweep through said lubricant stored within said lower'f rtion of said cap housing and to mesh with said "inion at a point inproximity to said bearing. wherebylubricant elevated byjsaid other gearelement will become eifective tolubrlcate said CONRAD E, FRUDDEN.

